JP2019058059A - Grommet and wiring harness - Google Patents

Abstract

To improve water cut-off performance if a bar ring of a vehicle body panel is inclined to a panel face.SOLUTION: A grommet 10 has a tapered cylinder part 11 inserted into a bar ring 21 from an outdoor side with an electric wire group W inserted to be fitted to cut off water; and a panel fitting part 12 formed at a base end-side outer surface part of the tapered cylinder part 11 to be fitted to the bar ring 21. The fitting part 12 comprises: an annular groove part formed to accommodate a tip face-side part of the bar ring 21 such that the tip face-side part bites in a tip direction; an arc rib formed connecting with a tapered cylinder outer surface part and coming into contact when assembled to the bar ring 21; an annular plane part formed connecting with the arc rib and facing a vehicle body panel 20 which surround an outer side of the bar ring 21; and an auxiliary seal part formed connecting with the annular plane part and projecting at an outer peripheral end of the annular plane part annularly surrounding the annular plane part to an indoor side more than the annular plane part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a grommet and a wire harness that are installed in a through-hole of a vehicle panel or the like and that consider water-stopping properties through which an electric wire group is inserted.

  Conventionally, a through-hole has been provided in a vehicle body panel such as a dash panel that partitions an automobile engine room and a vehicle compartment, and a wiring harness is generally routed between the engine room side and the vehicle compartment side through this through-hole. It has been broken. When arranging such a wire harness, a grommet is provided between the wire harness and the through-hole of the vehicle body panel to prevent water and dust from entering through the clearance between the through-holes and noise.

  Many through holes in the body panel are provided with burring. For body panels with burring, it is necessary to design the grommet shape to ensure water-stopping in consideration of the burring shape.

  An example of a grommet fitted into a through hole having a burring provided in a vehicle body panel is that described in Patent Document 1. As shown in FIG. 7, the grommet 10 described in Patent Document 1 includes a tapered portion 2 and a fitting portion 3, and the fitting portion 3 includes a first groove portion 4, a second groove portion 6, an annular protrusion 5, and a collar. Part 7. Further, the burring of the panel 11 stands vertically.

  When the panel 11 is fitted to the grommet 10, the rising portion of the burring presses the annular protrusion 5 and seals at three points A, B, and C in FIG.

JP-A-4-249817

  However, the shape of the burring is not only one that rises perpendicular to the panel surface as described in Patent Document 1, but also one that is inclined. An example in which a grommet is fitted to a panel having a burring inclined with respect to such a panel surface is shown in FIG. In the example shown in FIG. 8, since the surface where the burring and the grommet are in contact with each other is inclined, there is a problem that sufficient surface pressure cannot be obtained and water stoppage is lowered.

  The present invention has been made in order to solve the above-described problems, and a grommet capable of improving water-stop when a burring of a vehicle body panel is inclined with respect to the panel surface, and a wire harness using the grommet The purpose is to provide.

  In order to achieve the above object, the grommet according to the present invention has a tapered cylindrical shape in which a burring formed on a partition panel separating the outdoor and indoors protrudes indoors from the partition panel. A grommet that is inserted so as to be inserted from the outdoor side to stop water in the inserted state, and has a tapered cylindrical portion whose cylindrical diameter gradually increases from the distal end side to the proximal end side in the insertion direction, and a base of the tapered tubular portion A fitting portion that is formed on an end-side outer surface portion and is fitted to the burring, and the fitting portion is formed so as to accommodate a front end surface side portion of the burring when assembled to the burring. An annular groove portion and a taper that is formed so as to be connected to the annular groove portion and that is in close contact with a part of the small diameter side of the reference tapered cylindrical surface that coincides with the tapered cylindrical inner surface portion of the burring when assembled to the burring. The outer surface portion is formed so as to be connected to the outer surface portion of the tapered tube, and both side portions are straight sides with respect to the remaining portion of the reference tapered tube surface, the central portion has an arcuate cross section and protrudes outward, and the burring A first seal portion that is pressed against and closely contacts the inner surface of the tapered tube of the burring when assembled to the burring, and is formed to be connected to the first seal portion, and surrounds the outer side of the burring when assembled to the burring And an annular flat part facing the partition panel, and an annular flat part connected to the outer peripheral end of the annular flat part, and annularly surrounding the annular flat part and projecting inward from the annular flat part. A second seal portion and an annular shape surrounding the outer annular flat portion at an outer peripheral end of an outer annular flat portion formed outside the second seal portion, and a second portion protruding inward from the outer annular flat portion. 3 sea It is configured to include a part, a.

  With this configuration, the annular groove is accommodated in a state in which the end surface side portion of the burring bites in the front end direction, the outer surface portion of the tapered tube is in close contact with the inner surface portion of the tapered tube, and the first seal portion is pushed into the burring. Deforms and adheres closely to the inner surface of the tapered tube of the burring. Further, the second seal portion is in close contact with the partition panel at a position surrounding the annular flat portion in a state where the first seal portion is pushed into the burring and deformed.

  Accordingly, since the annular groove portion, the tapered cylindrical outer surface portion, the first seal portion, and the second seal portion are in close contact with and fitted to the burring, the fitting portion can secure the surface pressure. The water stoppage can be improved when it is inclined with respect to.

  The grommet according to the present invention may be configured such that when the annular groove portion accommodates the tip surface side portion of the burring, the tip surface side portion of the burring bites into the tip direction.

  With this configuration, when the tip surface side portion of the burring is accommodated in the annular groove portion, the tip surface side portion of the burring bites into the annular groove portion in the tip direction, and the adhesion between the burring and the grommet is strengthened to improve the water stoppage. Can do.

  The grommet which concerns on this invention may be comprised so that the height from the said annular plane part to the lower end of the said taper cylinder part may become smaller than the height of the perpendicular direction of the said burring so that the said bite state may arise.

  With this configuration, when the grommet is assembled to the partition panel, the burring bites into the grommet side and a vertical force is applied, so that the grommet can be strongly adhered and the waterstop can be improved.

  The grommet which concerns on this invention may be comprised so that the internal diameter in the upper end of the said taper cylinder inner surface part of the said burring may become smaller than the minimum internal diameter of the said annular groove part so that the said bite state may arise.

  With this configuration, when the grommet is assembled to the partition panel, the burring bites into the grommet side and a horizontal force acts, so that the adhesion of the grommet can be increased and the water stoppage can be improved.

  A wire harness according to the present invention includes a wire group and the grommet, the tape is formed by inserting the wire group into the grommet, and winding the adhesive tape on the tip end side of the grommet. It is the structure connected and fixed by a fixing | fixed part.

  With this configuration, in the wire harness according to the present invention, the electric wire group is inserted into the grommet, and the electric wire group and the grommet are connected and fixed by the tape fixing portion formed by winding the adhesive tape on the tip side of the grommet. Later, when an external force acting laterally from the center of the grommet is continuously applied to the wire group inserted through the grommet, the base end side of the grommet is deformed to a side pulled by the external force.

  In this case, the grommet is in a state where the annular groove portion and the front end surface side portion of the burring become shallower on the side opposite to the deforming side, but the close contact is not released, and the first seal portion has almost no Deformation does not occur, and the state of being in close contact with the inner surface of the tapered barrel of the burring is maintained. For this reason, even if the close contact between the second seal portion and the outer surface of the partition panel is weak, and moisture may be transmitted to the annular flat portion from this point, the moisture passes through the first seal portion. Thus, the water stoppage can be improved without reaching the indoor side of the partition panel.

  According to the present invention, water stoppage can be improved when the burring of the vehicle body panel is inclined with respect to the panel surface.

It is a longitudinal cross-sectional view which shows the structure of the wire harness and grommet which concern on embodiment of this invention. FIG. 4 is a partial cross-sectional view showing a fitting portion of the grommet according to the embodiment of the present invention before fitting the vehicle body panel. FIG. 5 is a partial cross-sectional view showing details of a fitting portion of the grommet according to the embodiment of the present invention before fitting the vehicle body panel. FIG. 5 is a partial cross-sectional view showing a fitting portion after fitting a vehicle body panel of the grommet according to the embodiment of the present invention. FIG. 10 is a partial cross-sectional view showing a modified example of the fitting portion after fitting the vehicle body panel of the grommet according to the embodiment of the present invention. It is sectional drawing which shows the vehicle body panel fitted to the grommet which concerns on embodiment of this invention. It is a longitudinal cross-sectional view which shows the example of the conventional grommet used for a wire harness. FIG. 6 is a longitudinal sectional view showing an example in which a vehicle body panel is fitted to a conventional grommet used for a wire harness.

  Hereinafter, embodiments of a grommet and a wire harness according to the present invention will be described with reference to the drawings.

  FIG. 1 is a longitudinal sectional view showing a grommet and a wire harness according to the present embodiment. As shown in FIG. 1, the wire harness 1 includes an electric wire group W and a grommet 10. The wire harness 1 is fitted through a grommet 10 to a vehicle body panel 20 that separates the interior side and the exterior side of the vehicle body.

  The electric wire group W includes a plurality of electric wires, and is inserted into the grommet 10 from the indoor side of the vehicle body to the outdoor side. The wire group W and the grommet 10 are connected and fixed by winding an adhesive tape at a tape fixing portion 22 on the tip side of the grommet 10. Note that the upper side of the vehicle body panel in FIG. 1 is referred to as the indoor side, and the lower side is referred to as the outdoor side. Further, the lower side of the grommet is referred to as a proximal end side, and the upper side is referred to as a distal end side.

  As shown in FIG. 6, the vehicle body panel 20 is provided with a through hole through which the wire harness 1 is inserted, and a burring 21 is formed around the through hole. The burring 21 has a tapered cylindrical shape that protrudes indoors from the vehicle body panel 20 and inclines toward the center of the through hole.

  The vertical height of the burring 21 is A, and is formed to be larger than the height A ′ from an annular flat surface portion 16 described later to the lower end of the tapered tube portion 11. Further, the inner diameter at the upper end of the tapered cylinder inner surface portion 21a of the burring 21 is B, and is formed so as to be smaller than the minimum inner diameter B ′ of the annular groove portion 13 described later. This is because the front end surface side portion of the burring 21 bites into the panel fitting portion 12 when assembled to the burring 21 to improve the adhesion between the burring 21 and the grommet 10.

  In the present embodiment, the inclination of the tapered cylindrical shape of the burring 21 is about 60 degrees with respect to the vehicle body panel 20, but is not necessarily limited to this angle, and may be another angle such as 45 degrees. The burring 21 is adapted to be fitted to a panel fitting part 12 of the grommet 10 described later.

  Next, the vicinity of the panel fitting portion 12 of the grommet 10 will be described with reference to FIGS. FIG. 2 shows a state before the grommet 10 is fitted to the vehicle body panel 20. The grommet 10 includes a tapered cylinder portion 11 and a panel fitting portion 12. The grommet 10 is inserted from the outdoor side in a state where the wire group W is inserted, and is attached to the burring 21 so as to stop water from entering from the outside of the vehicle body. The grommet 10 is made of a flexible material such as rubber.

  The tapered cylinder portion 11 is configured such that the cylinder diameter gradually increases from the distal end side to the proximal end side in the insertion direction of the electric wire group W. By adopting such a shape, the grommet 10 can be easily inserted into the vehicle body panel 20.

  The panel fitting portion 12 includes an annular groove portion 13, a tapered tube outer surface portion 14, an arc rib 15, an annular flat portion 16, an auxiliary seal portion 17, an outer annular flat portion 18, and an outer auxiliary seal portion 19. The panel fitting part 12 is formed in the outer surface part of the base end side of the taper cylinder part 11, and is fitted to the burring 21 as shown in FIG. The panel fitting portion 12 constitutes a fitting portion according to the present invention, and the auxiliary seal portion 17 constitutes a second seal portion according to the present invention.

  The annular groove 13 is an annular groove-shaped space formed so as to accommodate the tip surface side portion of the burring 21 in a state of biting in the tip direction of the tapered cylinder portion 11 of the grommet 10 when assembled to the burring 21. When the front end surface side portion of the burring 21 is accommodated, the front end surface side portion of the burring 21 is configured to bite in the front end direction. In other words, the grommet 10 is configured such that the burring 21 bites in the front end direction while being attached to the vehicle body panel 20. The annular groove 13 has a minimum inner diameter B ′ at a position where the inner diameter is the smallest.

  In this way, the grommets 10 are in close contact with the burring 21 when the burring 21 bites into the tapered cylindrical portion 11, so that intrusion of water or the like is prevented and the water stoppage is improved in the close contact area. Here, the state of biting means a state in which the tip surface side portion of the burring 21 bites into the tip of the tapered cylinder portion 11 of the grommet 10 by about several mm as shown in FIG.

  The tapered cylinder outer surface portion 14 is formed so as to be connected to the annular groove portion 13 and is in close contact with a part on the small diameter side of the reference tapered cylinder surface L that coincides with the tapered cylinder inner surface portion 21 a when assembled to the burring 21.

  Here, as shown in FIG. 4, the reference tapered cylindrical surface L is a surface formed by a group of straight lines connecting both ends of the arc rib 15, and in the present embodiment, is directed toward the center of the grommet 10 with respect to the vehicle body panel 20. It is inclined about 60 degrees. The angle of about 60 degrees is adapted to the inclination angle of the burring 21 so that the arc rib 15 and the burring 21 can be in close contact with each other. If the inclination angle of the burring 21 changes, it may be changed accordingly. . The small diameter side is the side where the diameter of the annular grommet 10 is reduced, that is, the upper side in the figure.

  Since the taper cylinder outer surface portion 14 is on the reference taper cylinder surface L, it is inclined about 60 degrees with respect to the vehicle body panel 20 similarly to the reference taper cylinder surface L, and the inclination angle is the same as that of the burring 21. The tilt angle may be changed according to the tilt angle.

  The arc rib 15 is formed so as to be connected to the outer surface portion 14 of the tapered cylinder, and both side portions are straight sides with respect to the remaining portion L1 of the reference tapered cylinder surface L in a state before being assembled to the burring 21 shown in FIG. The central part has an arc shape in cross section and protrudes outward. Here, the remaining portion L1 is a surface that intersects the arc rib 15 in the state before the assembly to the burring 21 in the reference tapered cylindrical surface L shown in FIG.

  When the arc rib 15 is assembled to the burring 21 shown in FIG. 3, the arc rib 15 is pressed and deformed in close contact with the tapered cylinder inner surface portion 21a of the burring 21 in a direction perpendicular to the reference tapered cylinder surface L. In this intimate contact area, the pressing force of the arc rib 15 against the burring 21 in the direction perpendicular to the reference taper cylinder surface L is exerted, so that the adhesion force is large, preventing water and the like from entering and improving the water stoppage. Yes. The arc rib 15 constitutes a first seal portion according to the present invention.

  The annular flat surface portion 16 is formed so as to be connected to the arc rib 15, surrounds the outer side of the burring 21 when it is assembled to the burring 21, faces the vehicle body panel 20, and is located outside the vehicle body panel 20 when assembled to the burring 21. It is an annular plane that is in close contact with the surface. The height from the annular flat surface portion 16 to the lower end of the tapered tube portion 11 is A ′.

  In the present embodiment, the annular flat portion and the vehicle body panel 20 are in close contact with each other, but may be configured to have a gap as shown in FIG. This is because the grommet 10, the burring 21, and the vehicle body panel 20 are in close contact with each other in the annular groove portion 13, the arc rib 15, and the auxiliary seal portion 17, and a water stop effect is obtained.

  The auxiliary seal portion 17 is formed so as to be connected to the outer peripheral end of the annular flat surface portion 16, and protrudes in an annular shape surrounding the annular flat surface portion 16 and on the indoor side of the annular flat surface portion 16. When the grommet 10 is assembled to the vehicle body panel 20, the auxiliary seal portion 17 is pressed downward by the vehicle body panel 20 to deform and come into close contact therewith.

  The outer annular flat portion 18 is formed so as to be connected to the outside of the auxiliary seal portion 17 and constitutes a horizontal annular flat surface. In the present embodiment, the height of the outer annular planar portion 18 is lower than the height of the annular planar portion 16, and the outer annular planar portion 18 and the vehicle body are assembled with the grommet 10 shown in FIG. There is a predetermined gap without being in close contact with the panel 20. However, the height of the outer annular planar portion 18 may be the same as the height of the annular planar portion 16, and the outer annular planar portion 18 and the vehicle body panel 20 may be in close contact with each other during assembly.

  The outer auxiliary seal portion 19 is formed so as to be connected to the outer side of the outer annular plane portion 18. The outer auxiliary seal portion 19 is formed in an annular shape surrounding the outer annular plane portion 18 at the outer peripheral end of the outer annular plane portion 18 and on the indoor side of the outer annular plane portion 18. It is designed to protrude. When the grommet 10 is assembled to the vehicle body panel 20, the outer auxiliary seal portion 19 is pressed downward by the vehicle body panel 20 to deform and come into close contact therewith.

  In the present embodiment, one outer annular flat portion 18 and one outer auxiliary seal portion 19 are formed outside the auxiliary seal portion 17, but a plurality of sets may be formed.

  Next, the effect | action of the force which acts when the grommet 10 is assembled | attached to the vehicle body panel 20 is demonstrated using FIG. Since the height A ′ from the annular flat surface portion 16 to the lower end of the tapered tube portion 11 in the grommet 10 is smaller than the height A in the vertical direction of the burring 21, in order to assemble the grommet 10 to the vehicle body panel 20, first, the vehicle body panel 20 The arc rib 15 is deformed by pressing the auxiliary seal portion 17 and the outer auxiliary seal portion 19 downward in a direction perpendicular to the inclination direction of the burring 21.

  The arc rib 15 is deformed to the position of the reference tapered cylinder surface L, and becomes an arc rib 15 ′ indicated by a dotted line in the drawing. The auxiliary seal portion 17 and the outer auxiliary seal portion 19 are deformed to the height of the annular flat surface portion 16 to become an auxiliary seal portion 17 ′ and an outer auxiliary seal portion 19 ′ indicated by dotted lines in the drawing.

  Further, since the inner diameter B at the upper end of the tapered cylindrical inner surface portion 21a of the burring 21 is smaller than the minimum inner diameter B ′ of the annular groove 13, the tip portion of the burring 21 bites into the annular groove 13 of the grommet 10 and deforms the grommet 10. It is like that.

  After the grommet 10 is assembled to the vehicle body panel 20, the auxiliary seal portion 17, the outer auxiliary seal portion 19, the tapered cylinder portion 11, and the annular groove portion 13 of the grommet 10 exert a reaction force on the vehicle body panel 20 in the direction of the arrow in the figure. ing. Since this reaction force has a component in both directions, a horizontal component and a vertical component, the grommet 10 exerts a force to adhere to the vehicle body panel 20 in both the horizontal direction and the vertical direction.

  Therefore, the grommet 10 can maintain a close contact state with the vehicle body panel 20 with respect to an external force applied from multiple directions. For example, when compared with a configuration in which a force that makes close contact only in the horizontal direction is applied, the close contact state is more stable. Can be retained and has excellent water-stopping properties.

  As described above, the grommet 10 according to the present embodiment has a tapered cylindrical shape in which the burring 21 formed on the vehicle body panel 20 that separates the outdoor and indoors protrudes indoors from the vehicle body panel 20. The taper tube portion 11 is attached so as to be inserted from the outdoor side to stop water in a state where the electric wire group W is inserted, and the tube diameter gradually increases from the distal end side to the proximal end side in the insertion direction, and the tapered tube portion 11. And a panel fitting portion 12 which is formed on the outer surface portion of the base end side and is fitted to the burring 21.

  The fitting portion 12 is formed so as to be connected to the annular groove portion 13 and the annular groove portion 13 formed so as to accommodate the tip surface side portion of the burring 21 in a state of biting in the distal direction when assembled to the burring 21. A tapered cylindrical outer surface portion 14 that is in close contact with a portion of the reference tapered cylindrical surface L that coincides with the tapered cylindrical inner surface portion 21 a of the burring 21 when assembled to the burring 21, and a tapered cylindrical outer surface portion 14 that is connected. Further, both side portions are straight sides with respect to the remaining portion L1 of the reference tapered cylindrical surface L, the central portion has a circular arc shape in the cross section and protrudes outward, and when assembled to the burring 21, the tapered cylindrical inner surface portion 21a of the burring 21 The arc rib 15 is pressed against and closely attached to the arc rib 15, and surrounds the outer side of the burring 21 when facing the burring 21 and faces the vehicle body panel 20. An annular flat surface portion 16 and an auxiliary seal portion 17 which is formed to be connected to the outer peripheral end of the annular flat surface portion 16 and which surrounds the annular flat surface portion 16 and protrudes indoors from the annular flat surface portion 16 are provided. Yes.

  With this configuration, the annular groove 13 is accommodated in a state in which the tip surface side portion of the burring 21 bites in the tip direction, the taper tube outer surface portion 14 is in close contact with the taper tube inner surface portion 21 a of the burring 21, and the arc rib 15 is burring 21. The annular flat surface portion 16 is in close contact with the outer surface of the vehicle body panel 20. Further, the auxiliary seal portion 17 is in close contact with the vehicle body panel 20 at a position surrounding the annular flat surface portion 16 in a state where the arc rib 15 is pushed into the burring 21 and deformed.

  Accordingly, the panel fitting portion 12 has the annular groove portion 13, the tapered cylindrical outer surface portion 14, the arc rib 15, the annular flat surface portion 16, and the auxiliary seal portion 17, which are in close contact with and fitted to the burring 21. When the burring 21 of the panel 20 is inclined with respect to the surface of the vehicle body panel 20, the water stoppage can be improved.

  Further, when the tip surface side portion of the burring 21 is accommodated in the annular groove portion, the tip surface side portion of the burring 21 bites into the annular groove portion 13 in the tip direction, so that the adhesion force between the burring 21 and the grommet 10 It becomes stronger and can improve the water-stopping property.

  Further, the height from the annular flat surface portion 16 to the lower end of the tapered tube portion 11 may be configured to be smaller than the height of the burring 21 in the vertical direction.

  With this configuration, when the grommet 10 is assembled to the vehicle body panel 20, the burring 21 bites into the grommet 10 and a vertical force acts, so that the adhesion of the grommet 10 can be strengthened and the waterstop can be improved.

  You may comprise so that the internal diameter in the upper end of the taper cylinder inner surface part 21a of the burring 21 may become smaller than the minimum internal diameter of the annular groove part 13. FIG.

  With this configuration, when the grommet 10 is assembled to the vehicle body panel 20, the burring 21 bites into the grommet 10 side and a horizontal force acts, so that the adhesion of the grommet 10 can be increased and the waterstop can be improved.

  The wire harness 1 according to the present embodiment includes an electric wire group W and a grommet 10. The electric wire group W is inserted into the grommet 10, and the electric wire group W and the grommet 10 adhere to each other at the distal end side of the grommet 10. It is the structure fixed and connected by the tape fixing | fixed part 22 formed by winding a tape.

  With this configuration, in the wire harness 1, the electric wire group W is inserted into the grommet 10, and the electric wire group W and the grommet 10 are connected and fixed by the tape fixing portion 22 formed by winding an adhesive tape on the tip side of the grommet 10. After the grommet 10 is mounted, when an external force that acts laterally from the center of the grommet 10 continuously acts on the wire group W inserted through the grommet 10, the proximal end side of the grommet 10 is deformed to a side that is pulled by the external force.

  In this case, the grommet 10 is in a state where the biting between the annular groove portion 13 and the front end surface side portion of the burring 21 becomes shallow on the side opposite to the deforming side, but the close contact is not released, and the arc rib 15 Almost no deformation occurs, and the state of tightly contacting the tapered cylinder inner surface portion 21a of the burring 21 is maintained. For this reason, even if the close contact between the auxiliary seal portion 17 and the outdoor side surface of the vehicle body panel 20 is weak and moisture is transmitted to the annular flat portion from this position, the moisture passes through the arc rib 15 and the vehicle body. The water stoppage can be improved without reaching the indoor side of the panel 20.

  ADVANTAGE OF THE INVENTION According to this invention, when the burring of a vehicle body panel inclines with respect to a panel surface, the grommet which can improve a water stop and a wire harness using the same can be provided, and the grommet and wire harness in general Useful for.

DESCRIPTION OF SYMBOLS 1 Wire harness 10 Grommet 11 Tapered cylinder part 12 Panel fitting part (fitting part)
13 annular groove part 14 taper cylinder outer surface part 15 circular arc rib (1st seal part)
16 Annular plane part 17 Auxiliary seal part (second seal part)
20 Body panel (bulk panel)
21 Barring 21a Taper cylinder inner surface part 22 Tape fixing part L Reference taper cylinder surface L1 Remaining part W Electric wire group

In order to achieve the above object, the grommet according to the present invention has a tapered cylindrical shape in which a burring formed on a partition panel separating the outdoor and indoors protrudes indoors from the partition panel. a grommet that is mounted so as to stop water by inserting from the outdoor side inserted state, includes a fitting portion fitted to the front Symbol burring, the fitting portion is tapered tube prior Symbol burring A first seal portion that is pressed against and closely adheres to the inner surface portion, an annular shape that surrounds the annular flat surface portion at an outer peripheral end of an annular flat surface portion formed outside the first seal portion , and a chamber that is more than the annular flat surface portion. A second seal portion projecting inward, an annular shape surrounding the outer annular plane portion around an outer peripheral end of an outer annular plane portion formed on the outer side of the second seal portion, and a chamber than the outer annular plane portion Inward It is configured to include a third sealing portion, the to.

Claims (5)

A burring formed on the partition panel separating the outdoor and indoors has a tapered cylindrical shape projecting indoors from the partition panel, and is inserted into the burring from the outdoor side in a state where an electric wire group is inserted to stop water. A grommet that can be attached to
A tapered cylindrical portion in which the cylindrical diameter gradually increases from the distal end side to the proximal end side in the insertion direction;
A fitting portion that is formed on the base end side outer surface portion of the tapered cylindrical portion and is fitted to the burring;
The fitting portion is
An annular groove formed so as to accommodate a front end surface side portion of the burring when assembled to the burring;
A tapered cylindrical outer surface portion that is formed in connection with the annular groove and is in close contact with a portion of the small diameter side of the reference tapered cylindrical surface that coincides with the tapered cylindrical inner surface portion of the burring when assembled to the burring;
It is formed to be connected to the outer surface portion of the tapered cylinder, and both sides are straight sides with respect to the remaining portion of the reference tapered cylinder surface, the central portion has a circular arc shape and protrudes outward, and is attached to the burring. A first seal portion that is sometimes pressed against and closely contacts the inner surface of the tapered tube of the burring;
An annular flat surface portion formed to be connected to the first seal portion and surrounding the outer side of the burring when being assembled to the burring;
A second seal portion formed to be connected to the outer peripheral end of the annular flat surface portion, in an annular shape surrounding the annular flat surface portion, and projecting indoors from the annular flat surface portion;
A third seal portion that is annularly surrounding the outer annular flat portion at the outer peripheral end of the outer annular flat portion formed outside the second seal portion, and protrudes indoors from the outer annular flat portion; Grommet characterized by comprising.   2. The grommet according to claim 1, wherein the annular groove is configured such that when the front end surface side portion of the burring is received, the front end surface side portion of the burring is bitten in a front end direction. .   The height from the said annular plane part to the lower end of the said taper cylinder part was comprised so that it might become smaller than the height of the perpendicular direction of the said burring so that the said biting state might arise. Grommet.   The inner diameter at the upper end of the inner surface of the tapered cylinder of the burring is configured to be smaller than the minimum inner diameter of the annular groove so as to cause the biting state. The grommet according to item 1.   An electric wire group and the grommet according to claim 1, wherein the electric wire group is inserted into the grommet, and the electric wire group and the grommet are wound with an adhesive tape on a tip end side of the grommet. A wire harness that is connected and fixed by a tape fixing portion.

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